Sudden trans temp increase
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Elder User
Joined: Sep 2006
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From: NW Burbs of Illinois
Very smart! I have a handfull of set screws all the same size laying around. Hopefully I have the right size tap. Ill have to check that. I just got a shop for my business (lawncare) and all my tools are still at home, too cold to move anythign now. grrr
Elder User
Joined: Aug 2007
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I tapped on the end of the line this is where the bypass valve is. Dont weld this without correct tools and micrometer.This bushing has to be correct fit. You dont want crap in this line that will do other damage to your trany.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Easier yet Doug, tap the holes and JBweld it. If the tap is course enough, it ought to stay there and if done right requires minimal sanding/finishing. This is of course if you are surely replacing the assembly soon.
I like the hammer method. Warm up the truck and give that sucker a few good raps with a rubber mallet. It may just open up as it surely appears to be stuck. This seems to be the quickest thing to try and that would have my name on it. I would go out right now and try that.
I like the hammer method. Warm up the truck and give that sucker a few good raps with a rubber mallet. It may just open up as it surely appears to be stuck. This seems to be the quickest thing to try and that would have my name on it. I would go out right now and try that.
Lead Driver
Joined: Jun 2007
Posts: 7,760
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From: Hampton, Maryland.
I'm waiting on a call back from my guy at Gurnee Ford (he was delivering parts), I'll see if I can get a part number and if he has one.
Don't go nuts with a pressure washer and bend the fins on the cooler though. I'd think that the heat would melt any snow that got in there. The Boss mount covers up the front end where the trans cooler is pretty good too.
Don't go nuts with a pressure washer and bend the fins on the cooler though. I'd think that the heat would melt any snow that got in there. The Boss mount covers up the front end where the trans cooler is pretty good too.
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Elder User
Joined: Sep 2006
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From: NW Burbs of Illinois
Ahh ok, I see. I never had any of this apart before so I have no clue or idea what it looks like. Things are clicking now....................
Im going to try the set screw idea but you think its safe to just crimp the line?? Im going to get the part tomorrow anyhow, just need a fix until I can get the half hour downtime that I need to replace it.
Im going to try the set screw idea but you think its safe to just crimp the line?? Im going to get the part tomorrow anyhow, just need a fix until I can get the half hour downtime that I need to replace it.
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Elder User
Joined: Sep 2006
Posts: 679
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From: NW Burbs of Illinois
Easier yet Doug, tap the holes and JBweld it. If the tap is course enough, it ought to stay there and if done right requires minimal sanding/finishing. This is of course if you are surely replacing the assembly soon.
I like the hammer method. Warm up the truck and give that sucker a few good raps with a rubber mallet. It may just open up as it surely appears to be stuck. This seems to be the quickest thing to try and that would have my name on it. I would go out right now and try that.
I like the hammer method. Warm up the truck and give that sucker a few good raps with a rubber mallet. It may just open up as it surely appears to be stuck. This seems to be the quickest thing to try and that would have my name on it. I would go out right now and try that.
Things are really clicking!! I had no clue what or why i was tapping. im in just a forced panic im not thinking straight, Ill go tap on it right now since the smoke is clearing, LOL
Elder User
Joined: Aug 2007
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Remove the return line and check to see if you have flow. This can be done down line away from the trany.Why cant you go to ford and buy a replacement bypass line? One thing you have to remember is you still could have blockage in the cooler.Keep this in mind. Do not crimp the line!!!
Last edited by 05chop; Dec 22, 2008 at 09:29 PM. Reason: spelling
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Elder User
Joined: Sep 2006
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From: NW Burbs of Illinois
05Chop, I just replaced the cooler, so i know i have no blockage there.
I tried tapping and no luck. took the truck for a hard spin around the block and got the fluid up to 150 and tapped away. I tried a regular hammer too just to try it, no dice, coolers are still ice cold and temp hasnt dropped.
The trans was recently rebuilt so im pretty sure it has to be something easy?
Also, I will be getting the part I need in the AM but I need my truck to plow the snow that is about 7 hours away.
Also, that line looks like a pita to get too with the exhaust right there. It doesnt look as easy as I thought to replace.
So the valve is towards the front of the truck correct?
I tried tapping and no luck. took the truck for a hard spin around the block and got the fluid up to 150 and tapped away. I tried a regular hammer too just to try it, no dice, coolers are still ice cold and temp hasnt dropped.
The trans was recently rebuilt so im pretty sure it has to be something easy?
Also, I will be getting the part I need in the AM but I need my truck to plow the snow that is about 7 hours away.
Also, that line looks like a pita to get too with the exhaust right there. It doesnt look as easy as I thought to replace.
So the valve is towards the front of the truck correct?
Elder User
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Look here see the line that has the bump in the rear? The check valve hides in here.If you just had your trany overhaul dont do anything that will void your warranty Ford Super Duty 4R100 Tranny Transmission Side Photo
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Elder User
Joined: Sep 2006
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From: NW Burbs of Illinois
OK wish me luck, im headed out my shop to try and get this working. I feel that I have a pretty good understanding of how this all works. If the snow werent so close id just wait until the morning to get the part I need. Its already being held for me.
Post Fiend
Joined: Feb 2006
Posts: 11,892
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From: Middle Tennessee
Doug, it looks like you didn't read the link Izzy posted earlier. I did. From what I remember you may want to try that and see if fluid is going where it should. I hate to say it, but you better read that link and see if the pump is trying to push fluid to the cooler. Your pump may be toast. Of course we don't know because the cooler will never show warmth if no fluid is moving which could be the stuck valve. Unfortunately you need to do the Dieselsite tests and find out where the problem is. 
